How Clean Is Clear Lake?
Clear Lake has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Water clarity (Secchi depth): 1.5 ft. Phosphorus: 90.5 µg/L. Chlorophyll-a (algae): 44 µg/L. Trophic State Index: 69.
Cleanliness Snapshot
| Metric | Clear Lake | Minnesota avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 1.5 ft | — |
| Phosphorus | 90.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 44 µg/L | <10 = clean |
| Trophic State Index | 69 | <50 = clean |
How does Clear Lake compare?
Clear Lake's grade of F falls below the Minnesota state average of C. It ranks #4 of 6 lakes in Jackson County by water quality score. Multi-year monitoring data shows water quality is declining based on 2 years of records.